Let me start by saying that no one ever gets our accent right, except for the movie "O Brother Where Art Thou". Leo was close in "Django" but not quite.

Our dialect of English uses vocabulary, idioms and syntax that are intended to be either clever, funny sounding, or make a reference (typically to the Bible). For instance, white people in the South will spell things out for emphasis while intentionally spelling it wrong, most common that I've heard being "off" spelled "o-f-t" and "salt" spelled "p-s-a-l-t". Furthermore, our culture integrates Christianity into every aspect of itself usually without any accuracy to the real teachings of Christ, but they are true to the American traditionalist practice of large-denominational Protestantism. It's in the music, idioms, politics, everywhere. Another thing is that there are more racists here because blacks have been systematically impoverished for so long that being black in the south basically means that you were raised poor, which can equate to coming across as "trashy" and definitely equates to a higher crime-rate. Southerners, particularly the older ones, see the skin color as the problem when it's their economic status that is a result of their skin color.